Gauge for concrete floors



Jan. 17, 1933. F. o. BERGSTRAND 1,394,392

GAUGE FOR CONCRETE FLOORS Filed Nov. 9. 1931 2 Sheets-Sheet l J'ade wafer 5314 Be/ yazmw Jan. 17, 1933. F. o. BERGSTRAND GAUGE FOR CONCRETE FLOORS 2 Sheets-Sheet 2 Filed NOV. 9, 1931 Patented J an. 1 7, 1933' UNITED STATES FRANK o. IBERGSTRAND, or woaons'rnn, MASSACHUSETTS GAUGE FOR CONCRETE FLOORS Application filed November 9, 1931. Serial No. 578,897. v

. The principal object of this invention is to provide a light inexpensive gauge by which the bars or pipes used for determining the level of concrete, or other floors of plastic material, can be placed at different heights as desired for the particular thicknessof floor, a single construction of gauge being used for all thicknesses of floor.

Other objects of the invention are to provide a construction in which the thickness of the floor is determined by the adjustment of the gauge and the gauge is so made that no measuring has to be done; to provide a construction of gauge which-can be made very cheaply inlarge quantities to serve for floors of various standard thicknesses; to provide anchorage for the gauge to hold it in proper position while the concrete is belng laid, and to provide a construction WlllCh, by a simple change inone of the features of the gauge, will be suitablefor use either with a pipe or' an angle bar or any other design of strip employed to determine the level of the concrete; Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanyin drawings, in which Fig. 1 is aside view of apart of a concrete floor with the bar joist shown in elevatlon; 2 is an enlarged sectional view on the line 22 of Fig. 1;

Fig. 3 is a sectional view on the line 3-3 of Fig. 1; u

Fig. 4 is a horizontal sectional view on the line 44 of Fig. 1; Fig. 5 is a view similar to Fig. 2 showlng the adjustable part of the gauge alone;

Fig. 6 is a view similar to Fig. 5"showing a modification and the adjustable member for use with an angle bar; Fig. 7 is an edge view of the same; Fig. Sis a view-similar to Fig. 4', takenat a lower elevation showing a different position of the gauge;

Fig. 9 is a sectional Fig. 8, and

Fig. 10 is a view similar to Fig. 2 showing modifications employed when the gauge is used on a wide bar joist.

view on the line 9 -9 of In the construction of concrete'floors of the latest type, bar joists are used between the girders and the thickness of the concrete floor and its level condition is determined by wood strips, strips or bars supported on blocks or the like. In other words the strip or bar is supported with its upper surface at exactly the same elevation as the upper surface of the concrete floor. The concrete is then applied so that this strip or bar is just level with it at the top. Before the concrete fully hardens the stripor bar is-removed and the space left by it is filled later with concrete, made level, of course, with the rest of the floor. This procedure has not proved fully satisfactoryas it renders it difiicult to get the Fig. 1. The concrete floor 12, of course, is

placed above them with perforated metal, wire netting 18, or metal laths resting on the bar joists to hold the concrete while it is in a plastic condition and to strengthen the floor after the concrete is laid.

In the present case, gauges 14 are used, each consisting of Soft bendable sheet metal. The

gauge is formed with a horizontal part 16 having projecting ears 17 and 18 which may extend laterally or longitudinally. The lateral ones may be perforated at 19 to receive fastening devices. In the form shown in the first five figures, the ears 17 are bent down around the edges of the bar joists 11. In

either case, or in both, the gauge 14: is held in place. This gauge 14 is made of sheet metal such as galvanized iron or any other bendable material and it has an upright porto provide a space 21 in which the pipe 22 or bar 23 can be moved up and down to get it tion having two vertical bars 20 spaced apart into proper position. The two vertical strips 20 are provided wth perforations 24 located or apart, as may be desired, and chamfered at 25 to facilitate the insertion of the pipe or bar.

The gauge also comprises the adjustable part 15 which has a flat back andtwo ears 26 which extendin from the sides and are spaced from the back enough so that they can encompass the two strips 20. Both walls are provided with registering perforations '27. This piece is provided with atail 28 which, being of flexible bendable metahcan be used in several ways.

In the use of this device the sliding part 15 which constitutes a support for the pipe 22 is moved to thed-esired height-and fastening devices 29 inserted through the perforations 27 "and one set of perforations 24 to bring the-top of the-pipe to" exactlythe proper height for the thickness ofthe floor desired.

The perforations 2e are so locate d that this can be done and the floor itself '"Wlll. be enactly'2 or 3 any other standard height,

as may be required. On this account there is no measuring on the part of the user.

The stationary part lt of the gauge is secured to the bar joist byfianges 17 or flanges 18 and the sliding support 15 is placed in the proper position and fastened. When all these gauges are in position the pipes 22'are laid in the semi-circular recesses 30 in the tops of the sliding supports 15. 'These pipes 22 are all therefore located at the right height and perfectly level. The way in which the gaugeis fired in. position can bevaried considerably. In Fig. 2 the ordinary way is shown in which the ears 17 are simply bent around the edges of the barjoist 11.. This holds the ,whole device with sufficient rigidity. In addition the ears 18-ar-e shown with .sition near one edge.

perforations 19 so that the gauge can be nailed through. these perforations to a wooden j 01st below, when wood is used.

In Figs. 8 and 9 the base16 of the gauge is turned on the bar joist to a longitudinal po- The ears 18 are bent around over the edgev of thebar joist 35 and under it as shown in Fig. 9. In this case the verticalpart 14 is parallel with the edge of the barjoist35. This arrangement is used where thebar joist or other. supporting part is so wide that it is desired to place the gauge in this position or in places where, for one reason 'or'another, it is desired to place the gauge at right angles to the position shown employed. In this case the member 28 is bent around to the side and over the edge ofthe bar joist at 37,,as shown in full lines. In

dottedlines in this figure is shown a wire 38 which can be passed through one ofthe holes 24 of the-gauge and bent around the edge of only a few forms of the invention I amaw'a're otherwisethan as set forth in whatI claim is the bar joist 36. Each one of these constructions shown in Fig. 10 serves as an anchor for the gauge and the gauge is used in the same way as has been described.

In Figs. 6 and 7 a modification is shown which has been mentioned before and in this case the adjustable part of the gauge is provided withnotch es 39 for receivingan angular bar 23 or angle iron serving the same purpo as. e Pip H In all these "constructions and Ways of using the device the same results are secured. [The gauge is molded into the concrete with thepipe 22 or angle iron 23 to servefor a. 7

gauge, of course, is 'leftiinthe floor but serves no useful purpose therein afterwards. .Although I have illustratedand described of the fact thats'other modifications can be made therein by: any person, skilled in, the

.art without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited in this respect 1.i' In a concretef-floor',,or the like, the comblnation wlth aseries of barjoists, ofa thin foraminous metal support for the concrete carried on the bar-.*j0ists,-; a series of gauges held on thebarijoists, and strips supported by the gauges for. determining the level of the floor, said gauges each comprising'a sta ti'onary'partan'd a vertically adjustable. part having means for supporting and holding said strips. i

2. In an apparatus for use in leveling a conthe claims, but

crete floor, or the like,-the combination with I a series of bar joists, of a series ofgauges held on the bar. joists and strips supported by the gauges for determining the levelnof the floor, said. gauges each comprising a stationary part and a vertically adjustable part' having means for supporting and holding-said strips. A V

r 3. In an-apparatusj-of theclass described,

the combination of the bar joists, gauges fixed thereto and'havinga-vertical part proyided with avertical: line of-perforations,

members movable up and down said vertical part and perforated, .--means. extending through the perforations for securing the movable members-at the desired height to said vertical parts and straights/trips carried all at thesame heightby said vertical members. H

4:- As "an 'article of manufacture, a -floor gauge comprisinga stationary part having means for anchoring to thefloor supportin means and having a vertical member of so t sheet metal perforated at fixed levels, a movable part having provision for supporting at the top a floor leveling strip and means for securing the movable part to the vertical member at any one of said perforations, said soft member being adapted to have the part thereof projecting above the leveling strip bent down below the floor level.

5. As an article of manufacture, a floor gauge comprising a stationary part having a vertical member of soft sheet metal peracs forated at fixed levels, a movable part having provision for supporting a floor leveling strip, and means for securing the movable fixed my signature. 7 V

FRANK O. BERGSTRAND. 

